Journal
ACS OMEGA
Volume 3, Issue 6, Pages 6665-6672Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.8b00829
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Funding
- National Natural Science Foundation of China [21601090, 51663005, 21761007]
- Natural Science Foundation of Jiangsu Province [BK20160943]
- Start-up Foundation of Nanjing University of Information Science Technology [2015r047]
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Upon mixing of aqueous solutions of the freely soluble building blocks cucurbit[7]uril (Q[7]) and 4-sulfocalix[4]arene (SC[4]A), white microcrystals instantly separate in near-quantitative yield. The driving force for this assembly is suggested to be the outer-surface interaction of the Q[n]. Dynamic light scattering, scanning electron microscopy, and NMR (diffusion-ordered NMR spectroscopy) analyses have confirmed the supramolecular aggregation of Q[7] and SC[4]A. Titration H-1 NMR spectroscopy and isothermal titration calorimetry have shown that the interaction ratio of Q[7] and SC[4]A is close to 3:1. Moreover, the Q[7]/SC[4] A-based supramolecular assembly can accommodate molecules of some volatile compounds or luminescent dyes. Thus, this work offers a simple and highly efficient means of preparing adsorbent or solid fluorescent materials.
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